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Genes and Hereditary Vocabulary
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10
Science
7th Grade
12/08/2014

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Term
Trait
Definition
A characteristic that an organism can pass on to its offspring through its genes.
Term
Heredity
Definition
The passing of traits from parents to offspring
Term
DNA
Definition
Deoxribonucleic acid; the genetic material that carries information about an organism and it passed from parent to offspring.
Term
Chromosome
Definition
A double rod of condensed chromatin in the nucleus that contains DNA.
Term
Gene
Definition
The set of information that controls a trait; a segment of DNA on a chromosome that codes for a specific trait.
Term
Allele
Definition
The different forms of a gene.
Term
Genotype
Definition
An organism's genetic makeup or allele combinations (ex: BB, Bb, or bb).
Term
Phenotype
Definition
An organism's physical appearance or visible trait (ex: brown eyes,black eyes, blue eyes).
Term
Dominant Trait
Definition
A trait that is always expressed in the phenotype of an organism.
Term
Recessive Trait
Definition
A trait that is expressed only when two alleles are present.
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